All MaraDNS issues resolved

[Sam Trenholme]

I finally got some free time this week (yay to vacation time) and have
resolved all known MaraDNS issues:

* William Summers pointed out that MaraDNS does not handle ANY queries
that fit in 512 bytes.  Fixed.

* Nino pointed out that MaraDNS does not allow the RFC2317-compliant
slashes in host names.  Fixed.

* Mike Sands pointed out that Deadwood does not install.  Fixed.

* Debian bug 607739 asked for the hostname to be visible if there is a
DDIP MX record.  Implemented.

These bugfixes are in the latest MaraDNS snapshot:

http://www.maradns.org/download/2.0/snap/

- Sam